Only way to find out is to test it.
I agree.
On a 700-ish hp 557, the -3 and -3x power curves were so close from top to bottom it looked like you made two back to back pulls with no changes.
The two local motors that got built using the -3x(and nothing else was tested on either) were running 572-13 heads.
One is a 542, the other a 572.
I think it’s a good intake for big cubes, high CR, with high lift cams looking to keep the upper ranges of the power curve from dropping as fast....... even if that comes at a slight cost of max TQ output, and TQ output below peak.
It’s got a lot of runner and plenum volume, which may or may not be the hot ticket for certain combos.